[Scilab-users] How to plot3D with log axis

[Samuel Gougeon]

Hello,

Le 20/01/2016 20:33, Claus Futtrup a écrit :
> Hi there
>
> I have a bunch of data which I'm trying to plot in a 3D plot. 
> Background - it's impedance measurements of a loudspeaker, measured at 
> different input voltages. I have:
>
> voltage = [0.1 0.4 0.7 1.0];
> f = a vector of frequencies (from 1.4 Hz to 20000 Hz ... I have a 
> total of 27000 data points in this vector)
> m = a matrix of magnitude values, dimension matches frequency f and 
> voltage.
>
> The frequency axis should be plotted on a logarithmic plot. Otherwise 
> I get the strangest looking plot (basically just a dashed line with 
> the axes - no graphs).
>
> I solved this by plotting:
> plot3d(voltage,log10(f),m',alpha=35,theta=45,flag=[2,2,3]);
> When I plot a 2D plot, I can simply write something like
> a.log_flags  =  "nln";
> ... But what should I do in a 3D plot ???
??? The same. each character of "nln" means "*n*ormal" or 
"*l*ogarithmic", the first char for x, the second for y, the third for z.
So, unless i did not catch what you mean, just assign to a.log_flags the 
n|l modes that you want.

HTH
Samuel
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